Search found 540 matches

by Duk
Thu Jun 23, 2016 2:42 pm
Forum: Performance
Topic: Cool Alfa 2.5 V6 12V CNC head porting video
Replies: 10
Views: 4453

Re: Cool Alfa 2.5 V6 12V CNC head porting video

I always love seeing CNC porting. Especially as any sort of actual hand porting is a cr@p job to have to do................. :roll:
But those exhaust ports look huge and way too big for the ehaust valves.
by Duk
Fri Jun 17, 2016 10:06 pm
Forum: Performance
Topic: Merc Kompressor Supercharger?
Replies: 7
Views: 3737

Re: Merc Kompressor Supercharger?

Use 2 M45. Kinda like a down sized Aston Martin. :P :P :P :P
by Duk
Thu Jun 16, 2016 5:57 pm
Forum: Performance
Topic: Building the supercharger to the engine (75 3.0V6)
Replies: 252
Views: 66136

Re: Building the supercharger to the engine (75 3.0V6)

Also make sure that the intake to the supercharger is flowing as much air as the SC needs. Any flow restriction will cause the pressure ratio to change and increase discharge temperatures. A sensative pressure gauge that is tapped into the intake right next to the SC will give the most accurate meas...
by Duk
Thu Jun 16, 2016 2:25 am
Forum: Performance
Topic: Building the supercharger to the engine (75 3.0V6)
Replies: 252
Views: 66136

Re: Building the supercharger to the engine (75 3.0V6)

Did port the heads. Intergrating an waterinjection system for a few extra horses isn't worth the money in my opinion. It's 2.5" Enlarging it wil just move the torque crurve or not? Lose some in the middle gain som at the top? Just spraying some water in there won't make any extra horse power, you'l...
by Duk
Wed Jun 15, 2016 3:41 am
Forum: Performance
Topic: Building the supercharger to the engine (75 3.0V6)
Replies: 252
Views: 66136

Re: Building the supercharger to the engine (75 3.0V6)

Did you do any work to the heads? The standard ports are pretty poor and would help a bit. Water injection for the low cost high octane effect. Would expect it to allow you to run more on boost ignition advance and a bit leaner (tho probably not much point getting any leaner than a 12.5:1 AFR) and g...
by Duk
Wed Jun 15, 2016 1:19 am
Forum: Performance
Topic: Building the supercharger to the engine (75 3.0V6)
Replies: 252
Views: 66136

Re: Building the supercharger to the engine (75 3.0V6)

Unless there is a either the drive belt is slipping of there is a boost leak, I'd say that the torque curve looks normal. It's a positive displacement supercharger, so the whole thing is really just going to act like a larger capacity version of the same engine. So basically what ever would limit th...
by Duk
Mon Jun 13, 2016 3:55 pm
Forum: Performance
Topic: Building the supercharger to the engine (75 3.0V6)
Replies: 252
Views: 66136

Re: Building the supercharger to the engine (75 3.0V6)

Excellent end results. That high average torque will have the car being effortlessly fast.
I take it the dyno/computer is calculating that at the engine/allowing for drivetrain loss? Correction Method: DIN
by Duk
Sat Jun 11, 2016 6:22 pm
Forum: Suspension, Steering, Wheels, Tires
Topic: Front wheel bearing modification ideas
Replies: 8
Views: 3927

Re: Front wheel bearing modification ideas

105 uprights??? Tell us more.
by Duk
Thu Jun 09, 2016 11:24 pm
Forum: Suspension, Steering, Wheels, Tires
Topic: Front wheel bearing modification ideas
Replies: 8
Views: 3927

Re: Front wheel bearing modification ideas

I remember Jazig trying to fab up something with his work's CNC. Didn't finish it I think. I would like 5x100mm since my wheels are 5x100. So I was toying with the idea of the rear hub of an Audi TT FWD. I will look into the FC/FD front hub and maybe redrill it to 5x100. Otherwise I have to sell al...
by Duk
Thu Jun 09, 2016 5:03 pm
Forum: Suspension, Steering, Wheels, Tires
Topic: Front wheel bearing modification ideas
Replies: 8
Views: 3927

Re: Front wheel bearing modification ideas

What is your intended stud pattern? JazigK on AlfaBB and Alfaclubvic and I have been looking at using FC (Series 4/5) RX7 Turbo front hubs. They're aluminium and very light but still use the old school tapered roller bearing arangement with a lip seal rather than much nicer dual angular contact bear...
by Duk
Sat Mar 26, 2016 6:08 pm
Forum: Gearbox, Clutch and Driveshaft
Topic: driveshaft conversion
Replies: 378
Views: 95649

Re: driveshaft conversion

While sniffing around the net I found that the GTR does infact have a dampened tailshaft, with damping being provided by what looks a lot like a sprung centre that would be used in a clutch.
by Duk
Thu Mar 24, 2016 7:28 pm
Forum: Performance
Topic: Piggy Back Unichip question
Replies: 14
Views: 5299

Re: Piggy Back Unichip question

Something that needs to be understood about sensor bending interceptor tuners that is particularly apparent when adding forced induction, or more specifically, bigger injectors that are needed to supply the extra fuel that forced induction requires, is that the manipulation of the load sensor's sign...
by Duk
Wed Mar 23, 2016 7:56 pm
Forum: Performance
Topic: Piggy Back Unichip question
Replies: 14
Views: 5299

Re: Piggy Back Unichip question

Hi All Ive had a good read and i did see that a few people used a Unchip to aid in the remapping etc. I have a couiple of question if any one could help . 1. Unichip is there just 1 model and it fits all 1 for petrol and 1 for diesel 2. Is there more then 1 maker as i asked unichip uk and they said...
by Duk
Wed Jan 27, 2016 1:12 am
Forum: Performance
Topic: Jim K. 3.2 engine
Replies: 344
Views: 84560

Re: Jim K. 3.2 engine

I've wondered about things like that too. Your comment: "Alfa says their journals are big enough to make for very nice 'overlap' on the crank webs and a sturdy crank." does make some good sence, especially with the design of the crank. The way I see it, large diameter overlapping journals should giv...
by Duk
Tue Jan 26, 2016 11:47 pm
Forum: Performance
Topic: Jim K. 3.2 engine
Replies: 344
Views: 84560

Re: Jim K. 3.2 engine

Just to dig up the 'extra stroke subject' again............. I know that the Toyota 4AGE/4AGZE engines used 42mm big ends and I've seen over the years that plenty of them have both revved to the moon or produced impressive (plenty of 100hp/cylinder engines out there) force fed performance. So maybe ...